Chapter 16 T/F
Catalysts are not consumed by the reaction.
True
Catalysts are never listed in the rate law.
False
Catalysts are reaction intermediates.
False
Catalysts change the reaction pathway of reactions in such a way that the reactions become more exothermic.
False
Catalysts increase the rate of the forward reaction and reduce the rate of the reverse reaction.
False
Catalysts increase the size of the equilibrium constant so that there are more products at equilibrium.
False
If K > 1 for a reaction, then the activation energy for the forward reaction is larger than the activation energy for the reverse reaction.
False
If a plot of one over the concentration of a reactant as a function of time is linear, it means that the reaction is first-order relative to that reactant.
False
If a plot of the concentration of a reactant as a function of time is linear, it means that the reaction is first-order relative to that reactant.
False
If a plot of the concentration of a reactant as a function of time is linear, it means that the reaction is second-order relative to that reactant.
False
If a plot of the natural log of the concentration of a reactant as a function of time is linear, it means that the reaction is second-order relative to that reactant.
False
The half-life for both first-order and second-order reactions are independent of the initial concentration.
False
The larger the activation energy, the larger the rate constant.
False
The rate of a chemical reaction always increases with increasing temperature.
False
The rate of a chemical reaction increases with increasing temperature because at higher temperatures chemical bonds are weaker.
False
The rate of a chemical reaction increases with increasing temperature because of a decrease in the activation energy at higher temperatures.
False
The rate of a chemical reaction increases with increasing temperature because of an increase in the activation energy at higher temperatures.
False
After two half-lives, there will be 25% left of the reactant, assuming that the reaction is first-order relative to that reactant.
True
Catalysts change the reaction pathway of reactions in such a way that the activation energy is lowered.
True
Catalysts increase the rates of both the forward and reverse reactions.
True
If a plot of one over the concentration of a reactant as a function of time is linear, it means that the reaction is second-order relative to that reactant.
True
If a plot of the natural log of the concentration of a reactant as a function of time is linear, it means that the reaction is first-order relative to that reactant.
True
If a reaction is exothermic, most likely the activation energy of the forward reaction is less than the activation energy of the reverse reaction.
True
If ΔG ̊ > 0 for a reaction, then the activation energy of the forward reaction is larger than the activation energy for the reverse reaction.
True
The concentrations of the reactants affect the reaction rate, but not the rate constant.
True
The higher the temperature, the larger the rate constant.
True
The rate of a chemical reaction increases with increasing temperature because the rate constant is larger at higher temperatures.
True
The rate of a chemical reaction increases with increasing temperature because the reactants have more energy.
True
Typically, the higher the surface area, the faster the reaction
True
